The solution to the abnormality of the ubuntu desktop environment

$ rm -rf ~/.compiz* ~/.config/compiz* ~/.cache/compiz* ~/.gconf/apps/compiz* ~/.config/dconf ~/.cache/dconf ~/.cache/unity #删除dconf配置信息 $ dconf reset -f /org/compiz/ #重置Compiz $ setsid unity #重启Unity $ unity --reset-icons #重置Unity图标(可选)
实在不行就重新装ubuntu桌面

$ sudo apt-get install --reinstall ubuntu-desktop
$ sudo service lightdm restart